This page provides an overview of the most common malware applications. For specific steps you can take to protect against malware, see our Protect Against Viruses & Security Threats pages. Show
What is Malware?Malware is a catch-all term for various malicious software, including viruses, adware, spyware, browser hijacking software, and fake security software. Once installed on your computer, these programs can seriously affect your privacy and your computer's security. For example, malware is known for relaying personal information to advertisers and other third parties without user consent. Some programs are also known for containing worms and viruses that cause a great deal of computer damage. Types of Malware
Facts about MalwareMalware is often bundled with other
software and may be installed without your knowledge. Malware is very difficult to remove.
Malware threatens your privacy. Malware threatens your computer’s security. How do I know if I have Malware on my computer?Common symptoms include: Browser crashes & instabilities
Poor system performance
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Macro Virus: These type of virus infects word, excel, PowerPoint, access and other data files. Once infected repairing of these files is very much difficult. Master boot record files: MBR viruses are memory-resident viruses and copy itself to the first sector of a storage device which is used for partition tables or OS loading programs .A MBR virus will infect this particular area of Storage device instead of normal files. The easiest way to remove a MBR virus is to clean the MBR area, Boot sector virus: Boot sector virus infects the boot sector of a HDD or FDD. These are also memory resident in nature. As soon as the computer starts it gets infected from the boot sector. Cleaning this type of virus is very difficult. Multipartite virus: A hybrid of Boot and Program/file viruses. They infect program files and when the infected program is executed, these viruses infect the boot record. When you boot the computer next time the virus from the boot record loads in memory and then start infecting other program files on disk Polymorphic viruses: A virus that can encrypt its code in different ways so that it appears differently in each infection. These viruses are more difficult to detect. Stealth viruses: These types of viruses use different kind of techniques to avoid detection. They either redirect the disk head to read another sector instead of the one in which they reside or they may alter the reading of the infected file’s size shown in the directory listing. For example, the Whale virus adds 9216 bytes to an infected file; then the virus subtracts the same number of bytes (9216) from the size given in the directory. Which type of malware appears as a legitimate application providing a backdoor to malicious applications?Trojan horse programs are malware that is disguised as legitimate software. A Trojan horse program will hide on your computer until it's called upon. When activated, Trojans can allow threat actors to spy on you, steal your sensitive data, and gain backdoor access to your system.
Is a type of malware that installs or creates backdoor?Rootkit. Rootkits are secretly installed forms of malware which create “backdoors” (ways to infiltrate a system) allowing them to access a system.
What are the 4 main types of malware?The Most Common Types of Malware Attacks. 1) Adware. Adware serves unwanted or malicious advertising. ... . 2) Fileless Malware. ... . 3) Viruses. ... . 4) Worms. ... . 5) Trojans. ... . 6) Bots. ... . 7) Ransomware. ... . 8) Spyware.. What type of system security malware allows for access to a computer program or service without authorization?A backdoor virus or remote access Trojan (RAT) secretly creates a backdoor into an infected computer system that enables threat actors to remotely access it without alerting the user or the system's security programs.
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